Follow OTEL Semantic Conventions

[RubenCerna2079]

Open Telemetry currently does not follow the semantic conventions that are needed.
Follow this link to see the conventions: https://opentelemetry.io/docs/specs/semconv/http/http-spans/
Link that shows which HTTP metrics are already available: https://opentelemetry.io/docs/specs/semconv/http/http-metrics/
Link to similar issue to CosmosDB: https://opentelemetry.io/docs/specs/semconv/database/cosmosdb/

[JerryNixon]

Can this update make it into 1.5 before release?